Joliet, Illinois, is preparing for a weekend dominated by rain and thunderstorms, as a significant weather system is expected to move through the region. The system, arriving Friday evening and lasting through Sunday, is predicted to bring heavy rainfall, raising concerns about localized flooding, particularly in low-lying areas. The National Weather Service has issued advisories, urging residents to prepare for consistently wet conditions and potential disruptions to outdoor activities and travel. The approaching thunderstorms may also bring gusty winds and frequent lightning, which could lead to downed power lines and property damage. Residents are advised to stay informed about weather updates and heed warnings from local authorities.